VIC Selling 5-HTP Drugs Supplements - Legal in Australia?

Am I able to import and sell 5-HTP online, in Victoria or any other Australian states? This is a
drugs supplement that used to be freely available for purchase but has seemingly been phased out of chemists. It's available online both domestically and internationally.

I understand that 5-HTP can have a negative reaction if taken concurrently with MAOIs (treatment for depression), but am unable to find information specific to 5-HTP's legal status.